AM-2016-10007-A · Cassiteritearchived
physical & structuralrev. 2
| designation | Cassiterite |
|---|---|
| chemical formula | SnO₂ |
| classification | Oxide / Rutile group |
| crystal system | Tetragonal |
| mohs hardness | 6 – 7 |
| density (g/cm³) | 6.95 |
| colour | Sherry-brown on edges |
| type locality | Panasqueira, Castelo Branco, Portugal |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 474, 632, 776
notessubmitter remarks + registry
Standard cassiterite reference specimen. Supplied as a single piece on a small fragment of host matrix. Re-pass note (2026-05-17). Re-pass on 2026-05-17 reproduces previous measurements within experimental uncertainty.
chain of custody8 events · 5 seal-breaks
Events recorded against this accession in the registry's printed custody book. Operator initials are anonymous. Storage codes follow the convention vault-shelf-drawer.
| timestamp | stage | detail | op. |
|---|---|---|---|
| 2016-07-06 10:54 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | V.O. |
| 2016-07-09 12:35 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | R.E. |
| 2016-07-20 12:33 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: AMCSD #8910 | R.E. |
| 2016-07-21 11:36 UTC | storage | re-bagged, label re-printed; placed in vault A, shelf 16, drawer 10 | V.O. |
| 2018-07-21 13:09 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
| 2020-07-20 12:23 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
| 2022-07-20 08:33 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
| 2024-07-19 08:04 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
physical location: vault A · shelf 16 · drawer 10 · last documented inspection: 2024-07-19 08:04 UTC